نتایج جستجو برای: fiber diameter and coefficient of variation of fiber diameter

تعداد نتایج: 24090979  

Journal: :علوم دامی ایران 0
غلامرضا داشاب دکتری ژنتیک و اصلاح دام-دانشگاه زابل علی اصغر اسلمی نژاد استادیار د انشگاه فردوسی مشهد محمدرضا نصیری دانشیار دانشگاه علی اسماعیل زاده کشکوئیه دانشیار باهنرکرمان داود علی ساقی عضو هیئت علمی

regions on three ovine chromosomes (oar1, oar5 and oar25) were selected to study quantitative trait loci (qtl) segregating for wool traits in baluchi sheep. a total of 503 progeny from 13 half-sib families were genotyped for 15 microsatellite markers. the average number of progeny per sire was 38 and ranged between 16 and 59. data were collected from research centre on baluchi breed in 2009 and...

Irregularities are inherent to virtually all fibers, including the conventional textile fibers, the high-performance brittle fibers and newly developed nano-fibers. These irregularities can fall into two main categories: dimensional or geometrical irregularity (external) and structural irregularity (internal). For natural fibers such as wool, diameter variation along fiber length is atypical ex...

ژورنال: سلامت و محیط زیست 2016
فرهنگ دهقان, سمیه, مداح, بزرگمهر, گلبابایی, فریده,

Background and Objectives: The goal of the present study was to develop nanofibrous media filters containing MgO nanoparticles for future application in removing particles from gas stream. Materials and Methods: Electrospun nanofibers were fabricated using experimental design prepared by Response Surface Methodology. Optimization of electrospinning parameters was conducted for achieving the ...

Journal: :پژوهش های علوم دامی ایران 0
حمیدرضا انصاری رنانی حمیدرضا باقرشاه سپهر مرادی

the aim of this study was to determine the effect of age on fiber characteristics of one-humped female camels of semnan province. 50 grams of wool samples from the left midside area were randomly collected from 28 camels of three different age groups: young, adult and old and fibre characteristics were measured. statistical model used for this research was completely randomized design (crd). an...

In this paper, a new structure is provided for the dispersion compensating photonic crystal fibers in order to broaden the chromatic dispersion and increase the dispersion compensating capability in a wide wavelength range. In the structure, putting a combination of circular holes and a star structure in the inner core clad causes the dispersion coefficient profile to be broadened, and addition...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده برق و کامپیوتر 1392

abstract nowadaysphotovoltaic solar cells (pvs) areacknowledged the fastest growing energy technology in the word, however, they only account for only fraction of current global renewable energy capacity. it isrecognized that this incomplete market penetration has been largely a result of the technology’sexcessive cost. so researchers are trying to find innovative, economic way with theaim of ...

ژورنال: سلامت کار ایران 2016

Background and aims: In nanofibrous filters, morphological properties, diameter of fibers and porosity percent of media are the most filtration characteristics. Therefore, the present study aimed to optimize the electrospinning parameters for reaching to the desired values of the mentioned filter characteristics. Method: For this purpose, a study design was prepared using response surface me...

Journal: :international journal of occupational hygiene 0
somayeh farhang dehghan department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran farideh golbaaei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran bozorgmehr maddah department of chemistry, imam hossein university, tehran, iran rasoul yarahmadi department of occupational health, school of public health, iran university of medical sciences, tehran, iran asghar sedigh zadeh nuclear fusion research center, atomic energy organization, tehran, iran

original article   electrospun nanofibrous filter media have attracted considerable attention in the last decade. the present study aimed to develop the electrospun pan (polyacrylonitrile) filter media through experimental investigations for application in high-performance air filters. for this purpose, an experimental design was proposed to assess the effect of electrospinning process conditio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده منابع طبیعی گرگان 1391

چکیده: در این تحقیق تأثیر ملاس که یکی از محصولات جانبی صنایع قند می باشد به عنوان یک افزودنی مقاومت خشک جدید در بهبود پالایش پذیری و ویژگی های فیزیکی و مکانیکی مقوای کنگره ای کهنه (occ) مورد بررسی قرار گرفته شد. بدین منظور پنج سطح ملاس( 0،5، 10، 15 و 18%) و سه سطح درجه روانی(420،400و320 میلی لیتر)به عنوان فاکتورهای متغیر در نظر گرفته شد و برای هر تیمار کاغذهای دست ساز با مساحت 2cm200 و وزن پای...

Journal: :Small ruminant research : the journal of the International Goat Association 2000
Taddeo Duga Almeida Willems Somlo

Forty female Angora goats were selected at random from the experimental nucleus of the National Institute of Agricultural Technology (Pilcaniyeu, Argentina), with the aim of analyzing the variability of main fleece characteristics of the Angora goats and establishing an optimum sampling site. Samples were taken at the first and second shearings (12 and 18 months of age) from the following parts...

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